Results 31 to 40 of about 18,495 (200)

Fingerprinting CP-violating New Physics with B → Kμ + μ −

Journal of High Energy Physics, 2023
The B → Kℓ + ℓ − system is particularly interesting to explore physics beyond the Standard Model. Such effects could provide new sources of CP violation, thereby giving rise to Wilson coefficients which could not only be real, as assumed in most analyses,
Robert Fleischer, Eleftheria Malami, Anders Rehult, K. Keri Vos   +3 more
doaj   +1 more source

Scheme for Radiative CP Violation [PDF]

Physical Review Letters, 1995
We present a simple model in which CP symmetry is spontaneously broken only after the radiative corrections are taken into account. The model includes two Higgs-boson doublets and two right-handed singlet neutrinos which induce the necessary non-hermitian interaction. To evade the Georgi-Pais theorem, some fine-tuning of coupling constants is necessary.
Chang, Darwin, Keung, W. -Y.
openaire   +3 more sources

Complex S 3-symmetric 3HDM

Journal of High Energy Physics, 2023
CP violation plays a very important role in nature with implications both for Particle Physics and for Cosmology. Accounting for the observed matter-antimatter asymmetry of the Universe requires the existence of new sources of CP violation beyond the ...
A. Kunčinas, O. M. Ogreid, P. Osland, M. N. Rebelo   +3 more
doaj   +1 more source

CP VIOLATION IN KAON DECAYS [PDF]

International Journal of Modern Physics A, 1998
We review the Standard Model predictions of CP violation in kaon decays. We present an elementary introduction to Chiral Perturbation Theory, four-quark effective Hamiltonians and the relation among them. Particular attention is devoted to K→3π, K→ 2πγ and [Formula: see text] decays.
D'Ambrosio, G., Isidori, G.
openaire   +2 more sources

Three Merry Roads to T-Violation [PDF]

, 2013
This paper is a tour of how the laws of nature can distinguish between the past and the future, or be T-violating. I argue that, in terms of the basic argumentative structure, there are basically just three approaches currently being explored.
Roberts, Bryan W., Bryan W. Roberts
core   +1 more source

Leptogenesis from low energy CP violation

Journal of High Energy Physics, 2019
We revisit the possibility of producing the observed baryon asymmetry of the Universe via thermal leptogenesis, where CP violation comes exclusively from the low-energy phases of the neutrino mixing matrix.
K. Moffat, S. Pascoli, S. T. Petcov, J. Turner   +3 more
doaj   +1 more source

CPT and CP, an entangled couple

Journal of High Energy Physics, 2020
Even though it is undoubtedly very appealing to interpret the latest T2K results as evidence of CP violation, this claim assumes CPT conservation in the neutrino sector to an extent that has not been tested yet.
Gabriela Barenboim, Christoph A. Ternes, Mariam Tórtola   +2 more
doaj   +1 more source

Theory of CP violation [PDF]

Nuclear Physics B - Proceedings Supplements, 1998
13 pages, To appear in Proceedings of the Fifth Topical Seminar on The Irresistible Rise of the Standard Model, San Miniato al Todesco, Italy, April 21-25 ...
openaire   +2 more sources

Observation of Direct CP Violation in K_{S,L} to \pi \pi Decays [PDF]

, 1999
We have compared the decay rates of KL and KS toΠ+ Π- Π0Π0 final states using a subset of the data from the KTeV experiment (E832) at Fermilab. We find that the direct-CP-violation parameter Re (μ’/μ) is equal to [28.0±3.0(stat)±2.8(syst)]×10-4.
Nelson, KS, Stone, R, Wu, J-Y, Arisaka, K, Graham, J, Nguyen, H, Shawhan, PS, Graham, G, Pordes, R, Whitmore, J, Ledovskoy, A, Bright, S, McManus, AP, Crisler, MB, Nauenberg, U, Taegar, S, Jejer, V, Swanson, R, Albuquerque, IF, Stone, RL, Tripathi, A, Erwin, AR, Wah, Y, Averitte, S, Shawhan, P, Tesarek, RJ, Jensen, D, Winstein, B, Alexopoulos, T, Bergman, DR, White, HB, O'Dell, V, Pang, M, Alavi-Harati, A, Somalwar, SV, Cheu, E, Taegar, SA, Zimmerman, E, Arenton, M, Ramberg, EJ, Toale, PA, Thomson, GB, Coleman, R, Nakaya, T, Bown, C, Shanahan, P, Crisler, M, Wang, J, Ben-David, R, Winston, R, Kessler, R, Zimmerman, ED, Belz, J, Swallow, E, Schnetzer, S, Monnier, E, Hsiung, YB, McBride, PL, McBride, P, Nelson, K, White, H, Wu, J, Blucher, E, Jennings, J, Roodman, A, LaDue, J, Kobrak, HGE, Hsiung, Y, Bellantoni, L, Ray, R, Thomson, G, Cox, Brian, Ford, R, Kobrak, H, McManus, A, Yamanaka, T, Barker, A, Glazov, A, Hagan, K, Toale, P, Tschirhart, R, Hanagaki, K, Corcoran, M, Hidaka, S, Slater, W, Solomey, N, Lath, A, Suzuki, I, Swanson, RA, Ramberg, E, Jensen, DA, Bock, GJ, Bellavance, A, Qiao, C, Prasad, V, Senyo, K, Ray, RE, Golossanov, A, Swallow, EC, Barker, AR, Erwin, A, Corcoran, MD, Wah, YW, Mikelsons, P, Corti, G, Cox, B, Sadamoto, M, Tesarek, R, Somalwar, S, Halkiadakis, E, Quinn, B, Bergman, D, Childress, S, Bock, G, Albuquerque, I   +114 more
core   +1 more source

CP violation at the finite temperature

Physics Letters B, 2019
In this letter we explore the CP violation at the finite temperature. We show that a spontaneous CP-violating phase φ may arise at the temperature of the electroweak phase transition, and φ can provide a source term for generating the matter-antimatter ...
Wei Chao
doaj   +1 more source